Which of the following personal behaviors can contaminate food?

Wiping or touching the nose is a behavior that can lead to contamination of food because it can transfer bacteria or viruses from the face to the hands, and subsequently to the food being prepared. When food handlers engage in this behavior without properly washing their hands afterward, they increase the risk of pathogens being introduced into the food. The nose can harbor many microorganisms, including those responsible for colds and other illnesses, which can be harmful if ingested.

Using hand sanitizer regularly is actually a good practice to reduce the risk of contamination, provided it is used correctly and is effective against the pathogens of concern. Wearing gloves while cooking is a preventive measure that, when combined with proper handwashing, helps minimize the risk of contamination. Maintaining short fingernails also contributes to food safety by reducing the likelihood of food debris and bacteria being trapped under longer nails.